A patch is a flat area of color change in the skin that is greater than 10 millimeters wide.

Considerations:

Common Causes:

Home Care:

Call your health care provider if:

What to expect at your health care provider's office:

Review Date: 10/28/2008Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.